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<div class="title">send.c</div>  </div>
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<a href="send_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#include &lt;stdio.h&gt;</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#include &lt;stdlib.h&gt;</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;unistd.h&gt;</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &lt;fcntl.h&gt;</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;sys/types.h&gt;</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &lt;sys/socket.h&gt;</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#include &lt;netinet/in.h&gt;</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#include &lt;arpa/inet.h&gt;</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &lt;netdb.h&gt;</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;unistd.h&gt;</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;errno.h&gt;</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;netinet/if_ether.h&gt;</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;net/if.h&gt;</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;linux/sockios.h&gt;</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="send_8c.html#aba7bc1797add20fe3efdf37ced1182c5">   17</a></span>&#160;<span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="send_8c.html#aba7bc1797add20fe3efdf37ced1182c5">uint8_t</a>;</div><div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="send_8c.html#a273cf69d639a59973b6019625df33e30">   18</a></span>&#160;<span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> <a class="code" href="send_8c.html#a273cf69d639a59973b6019625df33e30">uint16_t</a>;</div><div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="send_8c.html#a435d1572bf3f880d55459d9805097f62">   19</a></span>&#160;<span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>    <a class="code" href="send_8c.html#a435d1572bf3f880d55459d9805097f62">uint32_t</a>;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment">//#define TCP_PORT 31416</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#ifndef TCP_PORT</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#error Please define TCP_PORT</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="send_8c.html#ad694096646db9ef480b7bd9e5afe6ab8">   26</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="send_8c.html#ad694096646db9ef480b7bd9e5afe6ab8">escape</a>(<span class="keywordtype">char</span> *message, <span class="keywordtype">int</span> size)</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;{</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="keywordtype">char</span> *buffer;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    <span class="keywordtype">char</span> *bptr;</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    <span class="keywordtype">char</span> *mptr;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;    <span class="keywordtype">int</span> len;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    len = <a class="code" href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a>(message);</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    <span class="keywordflow">if</span>(len &gt; size)</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    {</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;        <a class="code" href="posix_8c.html#a91ade11061b9b43b1edd37ff32f76591">fprintf</a>(<a class="code" href="posix_8h.html#a5ce35bd5ba5021fd3b2e951e8f497656">stderr</a>,<span class="stringliteral">&quot;message too long\n&quot;</span>);</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;        len = size;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    }</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    mptr = message;</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    buffer = <a class="code" href="system_8c.html#ae148919146e88c7c40c7e2f781649b31">calloc</a>(len+2,1);</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    bptr = buffer;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <span class="keywordflow">if</span>(!buffer)</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    {</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <a class="code" href="posix_8c.html#a4ce26afbb10890d31c53a8ff76d992e3">perror</a>(<span class="stringliteral">&quot;Can not allocate buffer\n&quot;</span>);</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;        exit(1);</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    }</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keywordflow">while</span>(*mptr)</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    {</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;        c = *mptr++;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        <span class="keywordflow">if</span>(c == <span class="charliteral">&#39;\\&#39;</span>)</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        {</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;            <span class="keywordflow">if</span>(*mptr)</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;            {</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                c = *mptr;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                <span class="keywordflow">if</span>( c == <span class="charliteral">&#39;n&#39;</span>)</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                {</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                    c = <span class="charliteral">&#39;\n&#39;</span>;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                    mptr++;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                }</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                <span class="keywordflow">else</span> <span class="keywordflow">if</span>( c == <span class="charliteral">&#39;r&#39;</span>)</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                {</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                    c = <span class="charliteral">&#39;\r&#39;</span>;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                    mptr++;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                }</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                <span class="keywordflow">else</span> <span class="keywordflow">if</span>( c == <span class="charliteral">&#39;t&#39;</span>)</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;                {</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                    c = <span class="charliteral">&#39;\t&#39;</span>;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                    mptr++;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                }</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;                <span class="keywordflow">else</span> <span class="keywordflow">if</span>( c == <span class="charliteral">&#39;f&#39;</span>)</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                {</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;                    c = <span class="charliteral">&#39;\f&#39;</span>;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;                    mptr++;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;                }</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            }</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        }</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        *bptr++ = c;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    }</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    *bptr = 0;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <a class="code" href="stringsup_8c.html#a17598481fa495598cd57447afde0ff6b">strcpy</a>(message,buffer);</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <span class="keywordflow">return</span>(<a class="code" href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a>(message));</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;}</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;</div><div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="send_8c.html#a9a62fadd2a5476668fdec898c42d4922">   87</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="send_8c.html#a9a62fadd2a5476668fdec898c42d4922">send_message</a>(<span class="keywordtype">char</span> *message, <span class="keywordtype">char</span> *ip, <span class="keywordtype">int</span> port, <span class="keywordtype">int</span> echoback)</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;{</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    <span class="keywordtype">int</span> sockfd, portno, n;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    <span class="keywordtype">char</span> buffer[4096];</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keyword">struct </span>sockaddr_in dest_addr;</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    <span class="keyword">struct </span>hostent *server;</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    portno = port;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    <span class="comment">// IF UDP use: AF_INET, SOCK_DGRAM, IPPROTO_UDP</span></div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <span class="comment">// TCP socket</span></div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keywordflow">if</span> (sockfd &lt; 0) </div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    {</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <a class="code" href="posix_8c.html#a4ce26afbb10890d31c53a8ff76d992e3">perror</a>(<span class="stringliteral">&quot;ERROR opening socket&quot;</span>);</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        exit(1);</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    }</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    server = gethostbyname(ip);</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    <span class="keywordflow">if</span> (server == <a class="code" href="cpu_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        <a class="code" href="posix_8c.html#a91ade11061b9b43b1edd37ff32f76591">fprintf</a>(<a class="code" href="posix_8h.html#a5ce35bd5ba5021fd3b2e951e8f497656">stderr</a>,<span class="stringliteral">&quot;ERROR, no such host\n&quot;</span>);</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        exit(0);</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    }</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <a class="code" href="mathio_8h.html#ad6078f8da2d30ecaef99e0c2d250c0c8">printf</a>(<span class="stringliteral">&quot;Host name: %s\n&quot;</span>, server-&gt;h_name);</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    bzero((<span class="keywordtype">char</span> *) &amp;dest_addr, <span class="keyword">sizeof</span>(dest_addr));</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    dest_addr.sin_family = AF_INET;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    bcopy((<span class="keywordtype">char</span> *)server-&gt;h_addr, </div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;         (<span class="keywordtype">char</span> *)&amp;dest_addr.sin_addr.s_addr,</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;         server-&gt;h_length);</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    dest_addr.sin_port = htons(portno);</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="keywordflow">if</span> (connect(sockfd,(<span class="keyword">struct</span> sockaddr *)&amp;dest_addr,<span class="keyword">sizeof</span>(dest_addr)) &lt; 0) </div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    {</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        <a class="code" href="posix_8c.html#a4ce26afbb10890d31c53a8ff76d992e3">perror</a>(<span class="stringliteral">&quot;ERROR connecting&quot;</span>);</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;        exit(1);</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    }</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    n = <a class="code" href="posix_8c.html#a072435300ac99e8d7c3749f45166e797">write</a>(sockfd,message,<a class="code" href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a>(message)+1);</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keywordflow">if</span> (n &lt; 0) </div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    {</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        <a class="code" href="posix_8c.html#a4ce26afbb10890d31c53a8ff76d992e3">perror</a>(<span class="stringliteral">&quot;ERROR writing to socket&quot;</span>);</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;        exit(1);</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    }</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    </div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    <span class="comment">// reads characters coming back from the connection - debugging</span></div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="comment">// interrup to exit</span></div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="comment">// this code blocks waiting for input</span></div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    <span class="keywordflow">if</span>(echoback)</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    {</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;        <span class="keywordflow">do</span></div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;        {</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            n = <a class="code" href="posix_8c.html#af104a2c05bef787e54c6925616e867df">read</a>(sockfd,buffer,<span class="keyword">sizeof</span>(buffer)-1);</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            <a class="code" href="posix_8c.html#a072435300ac99e8d7c3749f45166e797">write</a>(1, buffer, n);</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;        }</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;        <span class="keywordflow">while</span>(n);</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    }</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    <a class="code" href="posix_8c.html#a48dc1df1627501d3faed4bf1f9801759">close</a>(sockfd);</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;}</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div><div class="line"><a name="l00148"></a><span class="lineno"><a class="line" href="send_8c.html#a0ddf1224851353fc92bfbff6f499fa97">  148</a></span>&#160;<span class="keywordtype">int</span> <a class="code" href="send_8c.html#a0ddf1224851353fc92bfbff6f499fa97">main</a>(<span class="keywordtype">int</span> argc,<span class="keywordtype">char</span> *argv[])</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;{</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="keywordtype">int</span> i,ret;</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    <span class="keywordtype">int</span> echoback = 0;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    <span class="keyword">struct </span>net *p;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    <span class="keywordtype">char</span> message[8192];</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    <span class="keywordtype">char</span> ip[INET_ADDRSTRLEN];</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    <span class="keywordtype">int</span> port_no = TCP_PORT;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="comment">// htonl() and htons()..</span></div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    memset(ip,0,<span class="keyword">sizeof</span>(ip)-1);</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    memset(message,0,<span class="keyword">sizeof</span>(message)-1);</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    <span class="keywordflow">for</span>(i=1;i&lt;argc;++i) {</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        <span class="keywordflow">if</span>(<a class="code" href="stringsup_8c.html#abee00aec80e542c31b536a531ffe761a">strcmp</a>(argv[i],<span class="stringliteral">&quot;-i&quot;</span>) == 0) {</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            <a class="code" href="stringsup_8c.html#a17598481fa495598cd57447afde0ff6b">strcpy</a>(ip, argv[++i]);</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        }</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        <span class="keywordflow">if</span>(<a class="code" href="stringsup_8c.html#abee00aec80e542c31b536a531ffe761a">strcmp</a>(argv[i],<span class="stringliteral">&quot;-m&quot;</span>) == 0) {</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;            <a class="code" href="stringsup_8c.html#acdb13cf3724e976e98a6178baf0a3ac5">strncpy</a>(message,argv[++i], <span class="keyword">sizeof</span>(message)-1);</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;        }</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;        <span class="keywordflow">if</span>(<a class="code" href="stringsup_8c.html#abee00aec80e542c31b536a531ffe761a">strcmp</a>(argv[i],<span class="stringliteral">&quot;-p&quot;</span>) == 0) {</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;            <a class="code" href="mathio_8h.html#a79c7a2e931845b0fb6b2fa6d63939de4">sscanf</a>(argv[++i], <span class="stringliteral">&quot;%d&quot;</span>, &amp;port_no);</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;        }</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;        <span class="keywordflow">if</span>(<a class="code" href="stringsup_8c.html#abee00aec80e542c31b536a531ffe761a">strcmp</a>(argv[i],<span class="stringliteral">&quot;-e&quot;</span>) == 0) {</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;            echoback = 1;</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;        }</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    }</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;        </div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keywordflow">if</span>(!<a class="code" href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a>(ip) || !<a class="code" href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a>(message))</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    {</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;        <a class="code" href="posix_8c.html#a91ade11061b9b43b1edd37ff32f76591">fprintf</a>(<a class="code" href="posix_8h.html#a5ce35bd5ba5021fd3b2e951e8f497656">stderr</a>,<span class="stringliteral">&quot;usage: -i ip_address -m \&quot;message\&quot; [ -p port ]\n &quot;</span>);</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;        exit(1);</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    }</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    <span class="keywordflow">if</span>(!<a class="code" href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a>(message))</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    {</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;        <a class="code" href="posix_8c.html#a91ade11061b9b43b1edd37ff32f76591">fprintf</a>(<a class="code" href="posix_8h.html#a5ce35bd5ba5021fd3b2e951e8f497656">stderr</a>,<span class="stringliteral">&quot;Message missing\n&quot;</span>);</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;        exit(1);</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    }</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    <a class="code" href="send_8c.html#ad694096646db9ef480b7bd9e5afe6ab8">escape</a>(message, <span class="keyword">sizeof</span>(message)-1);</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    <a class="code" href="mathio_8h.html#ad6078f8da2d30ecaef99e0c2d250c0c8">printf</a>(<span class="stringliteral">&quot;ip:%s, port:%d, message:\n%s\n&quot;</span>,ip,port_no,message);</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;    fflush(<a class="code" href="posix_8h.html#a0c0ef221f95f64e8632451312fd18cc8">stdout</a>);</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <a class="code" href="send_8c.html#a9a62fadd2a5476668fdec898c42d4922">send_message</a>(message, ip, port_no, echoback);</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    <span class="keywordflow">return</span>(0);</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;}</div><div class="ttc" id="stringsup_8c_html_abee00aec80e542c31b536a531ffe761a"><div class="ttname"><a href="stringsup_8c.html#abee00aec80e542c31b536a531ffe761a">strcmp</a></div><div class="ttdeci">MEMSPACE int WEAK_ATR strcmp(const char *str, const char *pat)</div><div class="ttdoc">Compare two strings. </div><div class="ttdef"><b>Definition:</b> <a href="stringsup_8c_source.html#l00362">stringsup.c:362</a></div></div>
<div class="ttc" id="send_8c_html_a273cf69d639a59973b6019625df33e30"><div class="ttname"><a href="send_8c.html#a273cf69d639a59973b6019625df33e30">uint16_t</a></div><div class="ttdeci">unsigned short uint16_t</div><div class="ttdef"><b>Definition:</b> <a href="send_8c_source.html#l00018">send.c:18</a></div></div>
<div class="ttc" id="stringsup_8c_html_a895ea3a2f9901e4c962806cc15271339"><div class="ttname"><a href="stringsup_8c.html#a895ea3a2f9901e4c962806cc15271339">strlen</a></div><div class="ttdeci">MEMSPACE size_t WEAK_ATR strlen(const char *str)</div><div class="ttdoc">String Length. </div><div class="ttdef"><b>Definition:</b> <a href="stringsup_8c_source.html#l00146">stringsup.c:146</a></div></div>
<div class="ttc" id="posix_8c_html_a48dc1df1627501d3faed4bf1f9801759"><div class="ttname"><a href="posix_8c.html#a48dc1df1627501d3faed4bf1f9801759">close</a></div><div class="ttdeci">MEMSPACE int close(int fileno)</div><div class="ttdoc">POSIX Close a file with fileno handel. </div><div class="ttdef"><b>Definition:</b> <a href="posix_8c_source.html#l00685">posix.c:685</a></div></div>
<div class="ttc" id="send_8c_html_a435d1572bf3f880d55459d9805097f62"><div class="ttname"><a href="send_8c.html#a435d1572bf3f880d55459d9805097f62">uint32_t</a></div><div class="ttdeci">unsigned int uint32_t</div><div class="ttdef"><b>Definition:</b> <a href="send_8c_source.html#l00019">send.c:19</a></div></div>
<div class="ttc" id="posix_8c_html_a4ce26afbb10890d31c53a8ff76d992e3"><div class="ttname"><a href="posix_8c.html#a4ce26afbb10890d31c53a8ff76d992e3">perror</a></div><div class="ttdeci">MEMSPACE void perror(const char *s)</div><div class="ttdoc">POSIX perror() - convert POSIX errno to text with user message. </div><div class="ttdef"><b>Definition:</b> <a href="posix_8c_source.html#l01814">posix.c:1814</a></div></div>
<div class="ttc" id="stringsup_8c_html_acdb13cf3724e976e98a6178baf0a3ac5"><div class="ttname"><a href="stringsup_8c.html#acdb13cf3724e976e98a6178baf0a3ac5">strncpy</a></div><div class="ttdeci">MEMSPACE WEAK_ATR char * strncpy(char *dest, const char *src, size_t size)</div><div class="ttdoc">copy a string of at most N characters </div><div class="ttdef"><b>Definition:</b> <a href="stringsup_8c_source.html#l00179">stringsup.c:179</a></div></div>
<div class="ttc" id="posix_8c_html_a91ade11061b9b43b1edd37ff32f76591"><div class="ttname"><a href="posix_8c.html#a91ade11061b9b43b1edd37ff32f76591">fprintf</a></div><div class="ttdeci">MEMSPACE int fprintf(FILE *fp, const char *format,...)</div><div class="ttdoc">fprintf function Example user defined printf function using fputc for I/O This method allows I/O to d...</div><div class="ttdef"><b>Definition:</b> <a href="posix_8c_source.html#l02484">posix.c:2484</a></div></div>
<div class="ttc" id="posix_8c_html_a072435300ac99e8d7c3749f45166e797"><div class="ttname"><a href="posix_8c.html#a072435300ac99e8d7c3749f45166e797">write</a></div><div class="ttdeci">MEMSPACE ssize_t write(int fd, const void *buf, size_t count)</div><div class="ttdoc">POSIX Write count bytes from *buf to fileno fd. </div><div class="ttdef"><b>Definition:</b> <a href="posix_8c_source.html#l01180">posix.c:1180</a></div></div>
<div class="ttc" id="system_8c_html_ae148919146e88c7c40c7e2f781649b31"><div class="ttname"><a href="system_8c.html#ae148919146e88c7c40c7e2f781649b31">calloc</a></div><div class="ttdeci">MEMSPACE void * calloc(size_t nmemb, size_t size)</div><div class="ttdoc">calloc buffer POSIX function </div><div class="ttdef"><b>Definition:</b> <a href="system_8c_source.html#l00069">system.c:69</a></div></div>
<div class="ttc" id="stringsup_8c_html_a17598481fa495598cd57447afde0ff6b"><div class="ttname"><a href="stringsup_8c.html#a17598481fa495598cd57447afde0ff6b">strcpy</a></div><div class="ttdeci">MEMSPACE WEAK_ATR char * strcpy(char *dest, const char *src)</div><div class="ttdoc">copy a string </div><div class="ttdef"><b>Definition:</b> <a href="stringsup_8c_source.html#l00161">stringsup.c:161</a></div></div>
<div class="ttc" id="send_8c_html_ad694096646db9ef480b7bd9e5afe6ab8"><div class="ttname"><a href="send_8c.html#ad694096646db9ef480b7bd9e5afe6ab8">escape</a></div><div class="ttdeci">int escape(char *message, int size)</div><div class="ttdef"><b>Definition:</b> <a href="send_8c_source.html#l00026">send.c:26</a></div></div>
<div class="ttc" id="cpu_8h_html_a070d2ce7b6bb7e5c05602aa8c308d0c4"><div class="ttname"><a href="cpu_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a></div><div class="ttdeci">#define NULL</div><div class="ttdef"><b>Definition:</b> <a href="cpu_8h_source.html#l00055">cpu.h:55</a></div></div>
<div class="ttc" id="posix_8c_html_af104a2c05bef787e54c6925616e867df"><div class="ttname"><a href="posix_8c.html#af104a2c05bef787e54c6925616e867df">read</a></div><div class="ttdeci">MEMSPACE ssize_t read(int fd, const void *buf, size_t count)</div><div class="ttdoc">POSIX read count bytes from *buf to fileno fd. </div><div class="ttdef"><b>Definition:</b> <a href="posix_8c_source.html#l01006">posix.c:1006</a></div></div>
<div class="ttc" id="send_8c_html_a9a62fadd2a5476668fdec898c42d4922"><div class="ttname"><a href="send_8c.html#a9a62fadd2a5476668fdec898c42d4922">send_message</a></div><div class="ttdeci">void send_message(char *message, char *ip, int port, int echoback)</div><div class="ttdef"><b>Definition:</b> <a href="send_8c_source.html#l00087">send.c:87</a></div></div>
<div class="ttc" id="send_8c_html_a0ddf1224851353fc92bfbff6f499fa97"><div class="ttname"><a href="send_8c.html#a0ddf1224851353fc92bfbff6f499fa97">main</a></div><div class="ttdeci">int main(int argc, char *argv[])</div><div class="ttdef"><b>Definition:</b> <a href="send_8c_source.html#l00148">send.c:148</a></div></div>
<div class="ttc" id="mathio_8h_html_a79c7a2e931845b0fb6b2fa6d63939de4"><div class="ttname"><a href="mathio_8h.html#a79c7a2e931845b0fb6b2fa6d63939de4">sscanf</a></div><div class="ttdeci">int sscanf(const char *strp, const char *fmt,...)</div></div>
<div class="ttc" id="posix_8h_html_a0c0ef221f95f64e8632451312fd18cc8"><div class="ttname"><a href="posix_8h.html#a0c0ef221f95f64e8632451312fd18cc8">stdout</a></div><div class="ttdeci">#define stdout</div><div class="ttdef"><b>Definition:</b> <a href="posix_8h_source.html#l00270">posix.h:270</a></div></div>
<div class="ttc" id="mathio_8h_html_ad6078f8da2d30ecaef99e0c2d250c0c8"><div class="ttname"><a href="mathio_8h.html#ad6078f8da2d30ecaef99e0c2d250c0c8">printf</a></div><div class="ttdeci">MEMSPACE int printf(const char *format,...)</div></div>
<div class="ttc" id="posix_8h_html_a5ce35bd5ba5021fd3b2e951e8f497656"><div class="ttname"><a href="posix_8h.html#a5ce35bd5ba5021fd3b2e951e8f497656">stderr</a></div><div class="ttdeci">#define stderr</div><div class="ttdef"><b>Definition:</b> <a href="posix_8h_source.html#l00271">posix.h:271</a></div></div>
<div class="ttc" id="send_8c_html_aba7bc1797add20fe3efdf37ced1182c5"><div class="ttname"><a href="send_8c.html#aba7bc1797add20fe3efdf37ced1182c5">uint8_t</a></div><div class="ttdeci">unsigned char uint8_t</div><div class="ttdef"><b>Definition:</b> <a href="send_8c_source.html#l00017">send.c:17</a></div></div>
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